Wikimedia Bugzilla is closed!

Aaron -- what wiki is that on? I get:

mysql:wikiadmin@db1041 [metawiki]> describe cn_template_mixins;
+------------+----------------+------+-----+---------+----------------+
| Field      | Type           | Null | Key | Default | Extra          |
+------------+----------------+------+-----+---------+----------------+
| tmxn_id    | int(11)        | NO   | PRI | NULL    | auto_increment |
| tmp_id     | int(11)        | NO   | MUL | NULL    |                |
| page_id    | int(11)        | NO   | MUL | NULL    |                |
| mixin_name | varbinary(255) | NO   | MUL | NULL    |                |
+------------+----------------+------+-----+---------+----------------+
4 rows in set (0.00 sec)

And, the update script has it correctly as -- 

ALTER TABLE /*_*/cn_template_mixins
	ADD COLUMN `mixin_name` varchar(255) NOT NULL,
	ADD INDEX /*i*/tmxn_mixin_name (mixin_name);

-- so it should have been run automagically on beta and stuff.

See dberror.log, it's on testwiki

Patch applied -- just ran through a workup in CN on testwiki and didn't see any additional errors.